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05/21/2007 - spⁿ program update 

The spⁿ certification program is firmly back on track after the resumption of flying by the first spn test aircraft (D-CSPN) on 23 February. The German Federal Bureau of Aircraft Accidents Investigation (BFU) and the Federal Office of Civil Aviation (LBA) have not related the accident to the workmanship of the aircraft, and hence they authorize the test aircraft No 1 to resume the flight test program by end of February 2007.

When the BFU provided its initial feedback to Grob Aerospace from its investigation into the accident involving spⁿ  test aircraft No 2 (D-CGSP) in February this year, the exact reason for the crash had not yet been found. However the accident has led to the assumption that the separation of parts prior to the crash of the aircraft was due to elevator flutter at high speed. The investigation to date is currently focusing on the speed of the aircraft prior to the crash versus the allowed speed envelope of test aircraft No 2, which was not fully opened at the time of the accident.

Third spⁿ scheduled to fly in October

Test aircraft No 1 has been modified with both a series-production conforming wing-fuselage fairing and pitot static system, and is used for performance testing and system development. The spⁿ is now close to concluding its defined flight characteristics and stall developments. The current test aircraft will be joined by test aircraft No 3 in October 2007, which will focus on systems testing.

European EASA certification is on schedule for the April 2008, closely followed by FAA certification and first deliveries. Then the focus will be on certifying the aircraft for operations to and from airports such as London City, Lugano and St. Tropez during the course of next year.

10/16/2006 - spⁿ Flight envelope fully opened - 2nd prototype completes first flight
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10/15/2005 - spⁿ Flight Test Programme Update
After nearly fifty hours of flying, the spⁿ flight test program  continues to progress to plan.
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02/05 2006 - spⁿ flight tests re-affirm key performance specifications announced at June 2005 program launch
2nd prototype test aircraft to feature at EBACE just prior to entering
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